The German Gun Collectors Association has a Imman Meffert catalog reprint available for purchase. Click here to go to thier site and to view what they have to offer.
Following are images of an interesting Imman. Meffert Pirschstutzen. It’s notable features are a cleaning rod mounted under the barrel like a muzzle loading ram rod, an antler for end cap, Mannlicher-Schoenaur style scope blocks, a flip up tang aperature sight besides a fixed rear barrel sight, and a butter knife bolt handle.
The following images are courtesy-
Click on the follwing lines to see the Meffert files in PDF
The following images were supplied by the Harlock family of Western New York State. They are of a shotgun made by Imman. Meffert and sold by Nowotny in Prague.